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The 87890-01 system monitor module from Bently Nevada supervises vibration and position data inside turbine and rotating machinery protection systems. Plant engineers deploy this module whenever a rack needs centralized monitoring of multiple machine channels. Consequently, it keeps critical machinery data organized and available for protection logic and diagnostics.
Key Technical Specifications
The table below outlines the main physical and electrical parameters of the 87890-01 module.
| Parameter | Specification |
|---|---|
| Product Type | System Monitor Module |
| Compatibility | Bently Nevada 3300 / 3500 series systems |
| Dimensions | Approximately 254 mm x 127 mm x 51 mm |
| Weight | Approximately 1.1 kg (2.4 lbs) |
| Mounting | Rack frame or panel mounting base |
| Interface | Backplane bus and monitor channel inputs |
| Connectors | Multi-pin connector and terminal blocks |
| Component Count | Multiple signal processors, memory chips, and logic circuits |
| Energy Storage | On-board capacitors and battery backup for data retention |
| Monitoring Function | Vibration and position data supervision |
| Operating Temperature | 0 degrees C to 60 degrees C |
| Storage Temperature | -40 degrees C to 85 degrees C |
| Humidity | 5% to 95% non-condensing |
Functional Overview
This module collects data from monitor channels and organizes it for protection and diagnostic use. Therefore, it gives operators a clear picture of machine condition across the rack. The 87890-01 also stores configuration settings and passes status information to supervisory systems. Meanwhile, its onboard energy storage preserves stored data during brief power interruptions.
Installation and Handling Notes
Always verify rack addressing before inserting the 87890-01 into an active frame. In addition, check that firmware revision matches your system configuration. Secure all connectors fully to prevent intermittent data loss. Finally, document channel assignments for future troubleshooting.